https://mellyisbored.wordpress.com/2018/10/20/overflowing-from-the-cup-of-the-heart-the-feeling-of-love-bloom-into-you-nakatani-nios-interview/?fbclid=IwAR185uANdILLf4uXP_JtvjiO_pzQimU_cREh-zs5cdYbQXHyfbt2aFJivkQ

I like that the ending will be following the original work though. Most likely it'll be done before the manga reaches its end, but considering that the manga is supposedly 80% finished and the anime will take about another 2 1/2 months to reach that point, it'll probably be a non-issue.